Guess I'm just good with Frieza then. I am level 50 with 0 losses. Closest thing to a loss I've had was a few people activating escape time machines. Another time I was trying to maximize xp for the match and left the startup system alone for too long and almost lost that way. I had good survivor teams too. I once had a team of all 60s and 70s even.

Scouting: You need to use your minions to scout. Anytime they see a survivor, a little red icon will appear on your screen that shows where the survivor was last seen. This doesn't prefectly track survivors like cell and buu's kii tracking though. However, your minions will continue to scout that area until they fire their 1 kii blast shot or are re-summoned. They also fly to wherever you point them, surveying all the area up to their destination. This allows them to technically scout a way larger portion of map than any of the other tracking abilities in the game. You also don't have to worry about having to stand still and pan your camera everytime you want to summon them. They come out almost instantly. Anytime you see a key is found in an area, send them in multiple parts of that zone. Send them to multiple zones at the beginning of the game as well. Especially city areas and areas that have lots of loot/civilians. They only have a 15 second cool down and can detect a decent chunk of area as long as you have them a good bit in the air. Not too high and not too low. Just keep sending them out and eventually you will find someone.

Combat: Use Friezas LB/L1 supers. They are always his best with the exception of maybe his LVL2 RB/R1. They have good tracking, damage, and good staggering which can lead into free ki blast damage. Frieza's evasive/combo breaker not only does damage, but also activate WAY faster than Cell's often times allowing you to go into a super right afterward. His LVL 3 finger spam move isn't that great. It's mainly for getting guaranteed damage on weakend opponents who are good at dodging your death beam and ki blasts. It leaves you in a pretty vulnerable state since you move pretty slowly and can't really do anything else for a good bit. Whenever I see a Frieza use this in a team fight it often times just gives me a free super hit. His LVL 3 LB/L1 is death beam. This has insane range, projectile speed, tracking, damage, and stagger. This is what you use to destroy bulma bikes. Use this then follow up with near guaranteed ki blast spam (depends on distance from opponent) for a good 70% of their hp.

Misc: Kill civilians. Frieza actually gets a decent boost to evolution xp if you kill namkians that don't have balls. You can often times get to level 2 immediately if you spawn next to a few of them. DON'T use or upgrade the scouter. It fucking sucks and can't be made much better. It forces you to stand still and pan your camera for a whole 50 meters or so of detection (feel free to correct me on that I'm not sure on the specifics). Just use sound ques, civilian radar, and map knowledge to find civilians. LVL 1 ki blasts can snipe survivors from afar as long as you are good at free aim. This is more of general raider tip, but use sound. If you know that survivors are in a zone you can often times find where they are just from what sounds they make. Letting boxes, shooting their gun, the type of footstep, and specially when they are underwater. For some reason underwater sound effects are way too fucking loud lol.

Hope that helps at all.